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Mathematics
Tamara Hughes
25 February, 12:43
Is - 7+9 = - 9+7 true false or open
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Raul Shepard
25 February, 15:32
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The answer is false. - 7 + 9 is 2. - 9 + 7 is - 2
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Felicity
25 February, 15:36
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False: - 7+9=2 and - 9+7=-2 therefore 2≠-2
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